Yes, Micromax Canvas 2 does have fingerprint sensor.
No. Micromax Q4310 is not a waterproof mobile phone.
No. Canvas 2 does not have front camera flash.
No. During our review, we do not observe any heating issue.
Micromax Canvas 2 comes with 3075 mAh battery which is enough for a day's usage. It offers talk time of up to 8 hours on 4g network and about 250 hours stand-by time.